package com.atguigu.lease.common.utils;


import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import io.jsonwebtoken.*;
import io.jsonwebtoken.security.Keys;

import javax.crypto.SecretKey;
import java.util.Date;

public class JwtUtil {
   private static SecretKey secretKey = Keys.hmacShaKeyFor("ArisKDMoLDDlPM5REAP4FceQFEmuFI2t8".getBytes());
    public static String createJWT(Long userId,String username) {

        String jwt = Jwts.builder()
                .setExpiration(new Date(System.currentTimeMillis() + 360000000))
                .setSubject("LOGIN_USER")
                .claim("userId", userId)
                .claim("username", username)
                .signWith(secretKey, SignatureAlgorithm.HS256)
                .compact();
        return jwt;
    }

    //校验jwt令牌的合法性
    public static Claims parseToken(String token){

        if (token==null){
            throw new LeaseException(ResultCodeEnum.ADMIN_LOGIN_AUTH);
        }

        try{
            JwtParser jwtParser = Jwts.parserBuilder().setSigningKey(secretKey).build();
            return jwtParser.parseClaimsJws(token).getBody();
        }catch (ExpiredJwtException e){
            throw new LeaseException(ResultCodeEnum.TOKEN_EXPIRED);
        }catch (JwtException e){
            throw new LeaseException(ResultCodeEnum.TOKEN_INVALID);
        }
    }
}
